Gas meter casing



Aug. 22, 1950 w. D. WILSON ET AL 2,519,806

GAS METER CASING Filed Aug. 31', 1948 3 Sheets-$heet l VENTORS W402i? 0. Wm .50 Dan/41.0 c. E. Foam 1950 w. D. WILSON ET AL 2,519,806 I GAS METER CASING 3 Sheets-Sheet 2 Filed Aug. 31, 1948 FIG. 2

- INVENT R5 murse 0. 14/1450 2 DOA/41D CE IOOAE BY I 5* ATTORNEYS Filed Aug. 31, 1948 g- 1950 w. D. WILSON ET AL ,806

GAS METER GAS/ING- 3 Sheets-Sheet 5 FIG. 4

' INVENTORS M44752 D. W14 :0 ,1 DOA .440 C 5 1 001-5 BY s Q ATToRNEs Patented Aug. 2 2, 1950 UNITED STATES PATENT OFFICE GAS METER CASING Application August 31, 1948, Serial No. 47,104 In Great Britain July 4, 1946 2 Claims.

This invention relates to dry gas meters, our main object being to provide a simple and inexpensive construction involving relatively few separable parts.

According to the invention, a dry gas meter includes a main moulding or casting, in at least two portions to be bolted or otherwise secured to one another and jointly to provide the two main compartments (each of which is to be sub-divided by a diaphragm or the like into two measuring chambers), except that separate end plates may be used, and, above the main compartments, gas passages communicating with the outlet of the meter, and a valve plate, to be secured to the upper portion of the moulding or casting, having ports to coact both with the measuring chambers and with the said passages as necessary. The valve plate is preferably the bottom wall of a hollow chamber, formed as a moulding or casting, for the valves and meter mechanism.

In the accompanying drawings:

Figure l is a sectional elevation, taken mainly on the line l--l of Figure 2, of a gas meter according to the invention, but with one of the dia'phragms and its supporting ring and the meter mechanism omitted;

Figure 2 is a plan to a slightly smaller scale, of which the upper half has the top cover, top partition plates, valve covers and meter mechanism omitted; while the lower half is of the upper portion of the main casting;

Figure 3 is a cross-section, also to the smaller scale, through the upper portion of the main casting, the section being taken mainly on the line 33 of Figure 2; and

Figure 4 is an elevation, also to the smaller scale, of one of the diaphragm supporting rings, the subject of Patent Application No. 34,381/45.

In the construction shown there are two main portions which are die-cast (namely, an upper portion l2 and a lower portion !3) meeting along a horizontal plane i l which extends substantially centrally oi the measuring chambers. The interior of these two main portions is divided up into two main compartments by means of a vertical central partition H5. The lower edge and the vertical edges of this are rectilinear,as shown by Figure 4, except for slight bulges at the sides indicated at It, Hi though the plate of Figure 4 is not actually an elevation of the partition H5.

The upper portion 12 has formed in it, at its upper face, an opening ila (Figures 2 and 3) for each of the inside measuring chambers and an opening H b for each of the outside measuring chambers. It also has formed in it the exhaust passages l8, 18 (Figures 2 and 3) which are integral with transverse webs l9 and 28, 29, and which have openings 18a at the upper face. The

' central web 19 has its edge shaped according to the adjacent contour of the adjacent portion of the outlet passages l3, and in consequence the upper edge of the partition 15 is cut away, as indicated at 2| in Figure 4 (only more so than there shown as the outlet passage is deeper), in order to mate therewith. The web it is grooved at its edge, as shown at 2| in Figure 1, and the rest of the upper and lower portions l2, l3 are internally grooved in the same plane, also as shown at 2|, the groove extending completely round the meter in order to receive the edges of the partition l5. In a similar way, each of the webs 25, and the rest of the upper and lower portions 12, I3, are grooved, as shown at 22, 22, to receive the diaphragms.

Instead of mounting the diaphragms (of which only one, 24, appears in Figure 1) directly against the lower edges of the webs 29, we prefer to support each of them from a plate such as is shown at 25 in Figure 1 and in Figure 4, the plate having an opening 26 (shown as circular in this case) and an external periphery shaped as shown, the corner 2! being cut away to accommodate the outlet passages 58. The plate 25 has a groove 21 at its internal periphery into which fits the edge of the flexible portion of the diaphragm retained therein by an outwardlyspringing ring 28.

When the partition l5 and the plates 25 have been secured in position, with an appropriate jointing material applied as necessary, the parts are bolted to one another. Two such bolts 31! are shown in Figure 1, their lower ends being screwed into bosses 32 and their upper ends receiving washers and nuts 33 (Figure 2). After the diaphragms have been fitted the opposite sides of the casing are closed by detachable plates 34, only one being shown in Figure .1.

The upper face of the upper casting portion 12 is covered over by a valve plate 36 on which the nuts 33 bear, the valve plate being the bottom wall of a hollow chamber 31, which is also formed as a die-casting. ihis has in it, for each pair of measuring chambers, inlet ports 38, coacting with the openings l'la, ill), and an out-- let port 39 coacting with the outlet opening 5811. Each group of three ports is controlled by a movable valve cover 4! which is adapted to be driven by the diaphragms in a usual manner. That is to say, in one position of each valve cover, gas entering (from the left in Figure 2) along the inlet passage 42 passes through one of the inlet ports 38 into the associated measuring chamber while the other inlet port, associated with the other measuring chamber, is being connected to the outlet port 39 by means of the valve cover. The inlet passage 42, and also the chamber in which the valve covers 40 are mounted, are covered by two plates one of which is shown at 44 in Figure 1, the two plates meeting along the line ll in Figure 2-from which latter figure they are omitted.

The rest of the meter mechanism, not shown, arranged within the hollow chamber 31, is covered over by a top plate 48.

What we claim as our invention and desire to secure by Letters Patent f the United States 1. A dry gas meter having a casing and body comprising two complementary portions adapted jointly to provide two main compartments on opposite sides of a central vertical partition, the upper of said portions providing approximately the upper half of each of said main compartments and the lower of said portions providing the remainder of said main compartments, a separable central vertical partition, means carried by both said upper and lower portions for drawing the same into a gas sealed relationship, the upper of said portions above said main compartments having a wall provided with openings therethrough communicating with said main compartments, said wall also providing gas passages in its upper surfaces to communicate with the outlet of the meter, said upper and lower portions being provided with internal grooves for receiving and retaining said central partition, diaphragms supporting plates held in position by said upper and lower portions provided with diaphragms to divide each of said main compartments into two measuring chambers, and a valve plate securing on the upper or said portions and having ports therethrough to co-act both with the holes communicating with the measuring chambers and said passages.

2. A dry gas meter as claimed in claim 1 in which three sets of annular grooves are provided in said upper and lower portions, one of which secures the central vertical partition in place while the other two are disposed, one on each side of said central vertical partition for supporting said diaphragms supporting plates.

WALTER D. WILSON. DONALD C. E. POOLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 477,910 Milsted June 28, 1892 1,283,025 Armstrong Oct. 29, 1918 1,862,451 Armstrong June 7, 1932 1,893,601 Sprague Jan. 10, 1933 FOREIGN PATENTS Number Country Date 575,981 Great Britain Mar. 13, 1946 575,982 Great Britain Mar. 13, 1946 

